# SUM Calculator — Calculator just for summing

> Calculator just for summing (iPhone/iPad app by Yutaka Yasui.)

- Source: https://appshunter.io/ios/app/sum-calculator/id1543390836 (this page in markdown: same URL + `.md`)
- Developer: [Yutaka Yasui](https://appshunter.io/developer/1539577018)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 14.0 · 5 MB
- Languages: English, Japanese
- Released: 2020-12-07
- Data updated: 2025-01-09
- User reviews in markdown: https://appshunter.io/ios/app/sum-calculator/id1543390836/reviews.md

## What is SUM Calculator?

The "SUM Calculator" only calculates "add / subtract" and tax "included / excluded”.
However, by displaying the input field, item list, and calculation result separately, we provide an unprecedented UI / UX.
This app solves all the problems of conventional calculators such as "I don't know how much I calculated", "I made a mistake in the input", and "I can't correct it later and start over”.

There is a delete key in the input field, so if you accidentally press a number, you can easily correct it.
The entered items are displayed as a list , and you can check at a glance how many items you have entered.
In the list, you can change "add / subtract" and tax "included / tax excluded" later. (You cannot correct the entered number).
Also, items that are no longer needed can be deleted by swiping left.

This app does not have a "=" button, unlike the calculators that have existed so far.
The calculation starts when the item is entered in the list, and you can also check the total along the way.
And the corrections in the list will be reflected instantly to the culculation result.

You can also set the tax rate.
It is also possible to set "Round down (floor) / Round / Round up (ceil)" in case the tax calculation generates decimal numbers.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 広告の非表示 | $0.99 | one-time |
| Supporting app development | $0.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2020-12-08

Fixed app name issue.

### 1.0 — 2020-12-07

No release notes.

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## More apps by Yutaka Yasui

- [Cell Counter & Calculator](https://appshunter.io/ios/app/cell-counter-and-calculator/id6670227470)

All apps by Yutaka Yasui: https://appshunter.io/developer/1539577018

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2025-01-09.*